Sunday, September 27, 2015

A neutron star is about 20 km in diameter and has the
mass of about 1.4
times that of our Sun.

One teaspoonful would weigh a billion tons (or more)

Some neutron stars have jets of materials streaming out of them at
nearly the speed of light. As these beams pan past Earth, they flash
like the bulb of a lighthouse. This pulsing appearance led them to be called pulsars.